Furnace regulator



Jan. 8; 1929.

T. LONG FURNACE REGULATOR Filed May 12', 1927 (y 34 jug. i. 31 I 3' 3:0I 1 g IN.VENTOR ATTORNEY rvbearingfor the actuating lever.

' with a furnace Patented Jan. 8, 1929.

THOMAS none, or scorn BEND; INDIAN i I 2 unniest; Q REGULATO Ba vApplication filed May 12,

This invention relates'to improvements in v furnace regulators,and theobjects' thereof; are v to provide automatic means for operating thedraft andcheck dampers of a" fur-' nace and thereby'regulate the firetherein;

and to provide in connection with the automatic regulating means adevice controlled by the coal door wherebysaid dampers are automaticallyclosed upon opening coal door. Another object is to provide means foradjusting said" automatic means from a pointremote from the furnace.

, These'objects are accomplished by the construction illustrated in theaccompanying drawings in which I Fig.1 is a diagrammati'cal view of {theinvention appliedto a furnace of ordinary construction, theview beingaside elevationthereof ;v

' Fig. 2 is a similar view showing-afront' elevation ofjthes I Fig. '3is aside elevation of'a thermostatic rppliance formingfpa-rt of" theinvention, parts being broken away; V I Fig. 4 is a fragmentary planview of' the' structure shown in Fig; 3, a portion being in section; V

Fig. 5 is a front elevation of an actuating lever for the thermostatg'and Fig. 6 is a perspective view of afulcrum The characters appear'ng ithe" descriptiO H; refer to parts shown in the drawings and designatedthereon by 'jcorr'esponding The invention comprises in -combination 1which is provided with a coal door2,"a Fdra ft damper 3 andfits ashdoorit and a check damper 5'lin its smoke pipefi, and althermostatic'meansflhaving connections "with said dampersgfor their op- V Th,ethermostat consists io'f an gezgpansion member 7, preferablyin thegforingof, a tube, the tube 1 being positioned in the dome '8' of thefurnace; there being afix'ture 9lon' the I forward part of the tube forsecuring itin place. On the front end of ithe 'tube which jpr ')trud e'sfrom the fixture, is; mounted'a housing 10, the vforward endv of whichis curved and has a vertical'disposed opening 11 therein, the bottom ofsaid .housing also having an opening 12 therein. oscillating inembel3eXtends through the sidewalls 14: and 15 of the housing in which it issup ported, and has a fixedeccentric 16 thereon earan of the tilting19,27. Serial no. 190,715.

17 providedwith a weight 18 at itsouter v end, by, which arm theeccentricis adjustably 1 turned upon the axis of'the oscillating memberaccordingly as'said arm is r'nolvedfij"An.

having" a bifurcated'head- 20 is mounted upon said eccentric, whichfeccentric extends laterally through said head, and which lever extendsthrough-thejop'e'n-i ing 12- in"the housing. 1 A rod" 21 extendsactuating lever 19 longitudinally through the expansion mem "v ber'7;which rod is composed of metalthat' is less susceptible toexpansion whenheated thanthe expansion tube 7; the rear-end of; the rod being-securedto the corresponding endof the tube 7 by a plug 22 in which the rod isthreaded. The forward end of'the.

rod projects through the head 20 of th'eac tuatin lever -=andhas adjustably{secured thereoh a fulcrum block 23, vvhich block has wedge shapedbearings 24 that bear *res e'c tively in correspondingnotches 25in thefront of said head, there being a nut-26 on said rod for adjustingsaidblocki On the forward end of the rod 21 is adjustablyse cured abracket 27 upon which is'pivotally mounted an indicator namesthatprotrudes through the slotlljand has a bent finger 28" of thehousing. Said hand has" an upwardly extending "lotted" arm 29 that isengaged by a "stationary pin wardly from the top of the housing and e'xjtends loosely through the slot" in said arm, so thatwhen said 1'0Cl'21l$ moved'lo'ngitudi that'overlaps the curved front face- 30 thatprojects downy fall? through the io o he, pansion a member 7 the hand 28'is caused to turn up on its pivot more or less accordingly. Like wisethe actuating lever 19 is caused to mrn upon the eccentric 16 throughthemediur'n of the rulcmm block and the rod 21thro'ugh the I action'bythe expansion member. v Positioned above th floor isa standard 31 uponwhich is pivotally mounted an adjust- 'ing'lever 32 that is connectedwith the weight 18 on the adjusting arm 17 by meansfoff a cable 33,there being a sector 34 on the standa ard for securing the lever 32 inadjusted positions. Beneath the floor '30 is secured a han er 35in whichis p ivotally 'supported'a bar 36, one end of which supports aand'th'egopp'osite endof "which is connected with the latch 38'on theIc'oal,v door 2' by. means of a chain 39.] The hanger 35 is so locatedrelative to the coalswivel pulley 37,

door that when the door isopened, the tilting bar is permitted to tiltso that the pulley 37 is lowered thereby.

An idler 40 is supported by a post 41' beneath the floor at a pointabove the check damper 5, and a cable 42-42 is connected at one end withsaid check damper and is strung over the idler and pulley 37accordingly.

its opposite end being secured to an arm 43 that projects from the sideof the draft damper 3. The cable 42 has alsoadjustable connection withthe actuating lever 19 at the outer-end thereof, and is of such lengththat normally when the check damper 5'is closed, the draft damper 3 willbe held ajar, or, as the draft damper 3 is closed, the i 'by to the rod21 so that the actuating lever 19 is swung upon the eccentric 1 6, andthe cable 42 attached thereto is 1 vpulled downwardly, permitting thedraft damper 3 to close and causing the check damper to open.- In thismanner combustion of fuel in the furnace is retarded when the heat inthe dome becomes excessive. WVhen the temperature in the dome recedesthe tube 7 consequently contracts so that the rod 21 moves forwardlypermitting movement of the lever 19 in the opposite directionfrom thatin the previous instant, thus causing the draft damper 3 to open and thecheck damper 5 to close. I

When the coal door 2 is swungopen, the bar 36 is relieved, permittingthe lever 19 to tilt and lower the pulley 37, causing the cable'42 toslacken, which permits both the 7 draft damper 3 and check damper 5' toclose. 1 In this manner when fuel is being supplied expansion of thetube 7.

to the furnace through its coal door, the

' suction of the draft in thesmoke pipe causes an inrush' of air throughthe coal door which preventstheemission of smoke and fumes from thefirebox into the furnace room.

close is somewhatgrea-ter than that of the draft damper, which isduetoplacing the connection of the cable l2 with the check damper closerto its hinge than the connection of the opposite end 42' of the cablewith the draft damper. Or, the check damper may be weighted so as tooverbalance the A draft damper In this manner, the

tendency is for the check damper to close and the draft damper to openopposed to the By raising or lowering the adjusting lever 32, theadjusting arm 17 is raised or lowered and the eccentric 16 is therebyadjusted and the poise of the lever lf) is altered so that the dampers 3and 5 controlled by the cable 4242' which is attached to the actuatinglever will be influenced accordingly at an earlier or later stage in theexpansion of the tube 7. Thus, by positioning the adjusting lever 32 thedampers may be initially set so that the combustion in the furnace willbe maintained at the desired rate, and by adjusting the bracket 27properly on the rod 21, the indicator hand 28 may be set so that itsfinger 28, by its movement over the curved face of the housing, willindicate the t a tric influenced by said thermostatic means;

an indicating member influenced by said thermostatic means; a t1-lt1ngmember including a pivoted bar and pulley supported on one end thereof;,a connection between the other end of said bar and the coal door ofsaid furnace wherebysaid bar is relieved when said door is opened so, as.to lower said pulley; and a cable extending over said pulley, one endof saidwcable havingconnection with said check damper and the other endthereof having connection with said draft damper and being movable sothat normally when the check damper is'closed the draft damper will beopened, and vice versa, said actuating lever having operative relationwith said cable.

2. In combination with a furnace provided with a coal. door, draftdamper and a check damper, a thermostatic meansin connection with saidfurnace; an oscillating member in 7 H v with said arm; an actuatinglever on said -The tendency of the check damper 5 to eccentricinfluenced by said thermostatic means; a tilting member including apivoted bar and pulley supported on one end thereof; a connectionbetween the other end of said bar and the coal door of said furnacewhereby said bar is relieved when said door is opened so as to lowersaid pulley; and a cable extending over saidjpulley, one end of saidcablehaving connection with said check damper and the other end thereofhaving connection with said draft damper and being movable so thatnormally when the check damper is closed the draft damper will beopened, and vice versa, said actuating lever having operative relationwith said cable."

3. In combination with afumaceprovided with a coal door, draft damperand a check M u-qu opened so as to lower said pulley;

ing a pulley supported thereby;

damper, a thermostatic means in connection with said furnace; anOscillating member including an eccentric thereon and an adjusting armtherefor; an actuating lever on said eccentric influenced by saidthermostatic means; a. tilting member including a pivoted bar andpulleysupported on one end thereof; aconnection between the other end ofsaid bar and the coal door of said furnace whereby said bar is relievedwhen said door is and a cable extending over said pulley, one end ofsaid cable having connection with said check damper and the other endthereof having l connection with said draft damper and being movable sothat normally when the check damper is closed the draft damper will beopened, and vice versa, said actuating lever having operative relationwit-h said cable.

4. In combination with a furnace having a coal door including a draftdamper and check damper, a thermostatic means in connection with saidfurnace; an adjusting member; an actuating lever supported by saidadjusting member influenced by said thermostatic means; a tilting memberincluda cable extending over said pulley and connecting said checkdamper and draft damper and being movable so that normally when thecheck damper is closed the draft damper will be opened; and vice versa,and an operable connection between said coal door and tilting memberwhereby said cable is slackened when said coal door is opened and boththe draft damper and check damper are thereby closed. I

5. In combination with a furnace having a coal door including a draftdamper and check damper, a thermostatic means in connection with saidfurnace; an actuating lever,

influenced by said thermostatic means; a tilting member including apulley supported thereby; a cable extending over said pulley andconnecting said check damper and drafts damper and being movable so thatnormally and both the draft damper and check damper are thereby closed.

6. In an appliance for controlling the draft damper and check damper ofa furnace, a pivotally supported lever member including a pulley at oneend thereof; a cable connecting said draft damper and check damper andextending over said pulley; a second cable connecting the other endof'said lever and the coal door of the furnace where y controlledmechanism influenced by the heat generated within the furnace, whichmechanism has actuating relation with the first cluding-a pulley at oneend thereof; a cable connecting said draft damper and check damper andextending over said pulley; and a second cable connecting the other endof said lever and the coal door of the furnace I whereby said lever isactuatedwhen the coal door is opened or closed;

In testimony whereof I afiix my signature.

THOMAS LONG.-

said lever is actuated when the'coal door i I is opened or closed; and athermostatically v

